·迎奥运,我该做什么?英语作文50-60词
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·迎奥运,我该做什么?英语作文50-60词
答案
As a small master,I really want to become a glorious Olympic volunteer,but I still too little to really become a volunteer.But I can still make contributions to the Beijing Olympic Games.First of all,...
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已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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